43 pitchers are tied for giving up the fewest runs this season, with 0 runs. The first three are Nick Burdi, Ryan Burr and Willi Castro.

Interpreted as:

MLB least runs allowed by a player this regular season

	NAME	R	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Nick Burdi N. Burdi	0	2025	BOS	4	0	0		0	0.00	5	0	0	0	5.1	5	0	0	2	0	2	0	21	1	8.44	3.38	2.50	0.00	23.8	9.5	1.31	.357	0.00	0	2.33	56	8.44	1.1
2	Ryan Burr R. Burr	0	2025	TOR	1	1	0	1.000	0	0.00	3	0	0	0	1.1	1	0	0	1	0	0	0	6	0	20.25	6.75	3.00	0.00	50.0	16.7	1.50	.500	0.00	0	0.83	20	6.75	0.5
3	Willi Castro W. Castro	0	2025	MIN	1	0	0		0	0.00	0	0	0	0	1.0	1	0	0	0	0	1	0	4	0	0.00	0.00		0.00	0.0	0.0	1.00	.250	0.00	0	3.08	75	9.00	0.1
4	Jhonathan Díaz J. Díaz	0	2025	SEA	1	0	0		0	0.00	1	0	0	0	1.1	1	0	0	0	0	1	0	5	0	6.75	0.00		0.00	20.0	0.0	0.75	.250	0.00	0	1.58	40	6.75	0.4
5	Matt Gage M. Gage	0	2025	DET	6	0	0		0	0.00	3	0	0	0	5.2	7	0	0	2	0	2	0	25	0	4.76	3.18	1.50	0.00	12.0	8.0	1.59	.350	0.00	0	3.08	76	11.12	0.6
6	Garrett Hampson G. Hampson	0	2025	TOT	1	0	0		0	0.00	0	0	0	0	1.0	0	0	0	0	0	1	0	3	0	0.00	0.00		0.00	0.0	0.0	0.00	.000	0.00	0	3.08	78	0.00	0.1
7	Hunter Harvey H. Harvey	0	2025	KCR	6	0	0		0	0.00	7	0	0	0	5.1	1	0	0	0	0	1	0	17	0	11.81	0.00		0.00	41.2	0.0	0.19	.100	0.00	0	0.45	11	1.69	2.1
8	Jose Herrera J. Herrera	0	2025	AZ	1	0	0		0	0.00	0	0	0	0	1.0	2	0	0	0	0	1	0	5	0	0.00	0.00		0.00	0.0	0.0	2.00	.400	0.00	0	3.08	79	18.00	0.1
9	Craig Kimbrel C. Kimbrel	0	2025	ATL	1	0	0		0	0.00	1	0	0	0	1.0	1	0	0	1	0	0	0	3	0	9.00	9.00	1.00	0.00	33.3	33.3	2.00	1.000	0.00	0	4.08	103	9.00	0
10	Michael Kopech M. Kopech	0	2025	LAD	8	0	0		0	0.00	8	0	0	0	7.0	3	0	0	4	0	1	0	29	1	10.29	5.14	2.00	0.00	27.6	13.8	1.00	.176	0.00	0	2.51	61	3.86	1.2
11	Tomás Nido T. Nido	0	2025	DET	1	0	0		0	0.00	0	0	0	0	1.2	0	0	0	0	1	1	0	6	0	0.00	0.00		0.00	0.0	0.0	0.00	.000	0.00	0	4.88	121	0.00	-0.2
12	Adam Ottavino A. Ottavino	0	2025	NYY	3	0	0		0	0.00	3	0	0	0	1.2	0	0	0	4	0	0	0	9	0	16.20	21.60	0.75	0.00	33.3	44.4	2.40	.000	0.00	0	6.68	159	0.00	-0.4
13	Evan Phillips E. Phillips	0	2025	LAD	7	0	0		0	0.00	6	0	0	1	5.2	4	0	0	2	0	1	0	22	0	9.53	3.18	3.00	0.00	27.3	9.1	1.06	.286	0.00	0	2.02	49	6.35	1.3
14	Robert Stephenson R. Stephenson	0	2025	LAA	2	0	0		0	0.00	2	0	0	0	1.0	0	0	0	0	0	0	0	3	0	18.00	0.00		0.00	66.7	0.0	0.00	.000	0.00	0	-0.92	-22	0.00	0.6
15	Zach Thompson Z. Thompson	0	2025	ATL	2	0	0		0	0.00	3	0	0	0	3.2	0	0	0	1	0	0	0	12	1	7.36	2.45	3.00	0.00	25.0	8.3	0.27	.000	0.00	0	2.26	57	0.00	0.7
16	Jose Trevino J. Trevino	0	2025	CIN	1	0	0		0	0.00	1	0	0	0	0.1	0	0	0	1	0	1	0	2	0	27.00	27.00	1.00	0.00	50.0	50.0	3.00		0.00	0	6.08	142	0.00	-0.1
17	Mason Thompson M. Thompson	0	2025	WSH	1	0	0		0	0.00	1	0	0	0	0.2	1	0	0	1	0	0	1	4	0	13.50	13.50	1.00	0.00	25.0	25.0	3.00	.500	0.00	0	4.58	112	13.50	0
18	Nicky Lopez N. Lopez	0	2025	TOT	1	0	0		0	0.00	0	0	0	0	0.1	0	0	0	1	0	1	0	2	0	0.00	27.00	0.00	0.00	0.0	50.0	3.00	.000	0.00	0	12.08	287	0.00	-0.3
19	Brooks Kriske B. Kriske	0	2025	CHC	1	0	0		0	0.00	1	0	0	0	2.0	1	0	0	2	0	1	0	8	0	4.50	9.00	0.50	0.00	12.5	25.0	1.50	.200	0.00	0	5.08	128	4.50	-0.3
20	Miles Mastrobuoni M. Mastrobuoni	0	2025	SEA	1	0	0		0	0.00	0	0	0	0	1.0	1	0	0	2	0	1	0	6	0	0.00	18.00	0.00	0.00	0.0	33.3	3.00	.250	0.00	0	9.08	232	9.00	-0.6
21	Weston Wilson W. Wilson	0	2025	PHI	2	0	0		0	0.00	0	0	0	0	3.0	3	0	0	0	0	2	0	12	0	0.00	0.00		0.00	0.0	0.0	1.00	.250	0.00	0	3.08	75	9.00	0.3
22	Rico Garcia R. Garcia	0	2025	NYM	1	0	0		0	0.00	2	0	0	0	2.0	1	0	0	0	0	1	0	7	0	9.00	0.00		0.00	28.6	0.0	0.50	.200	0.00	0	1.08	27	4.50	0.7
23	Davis Daniel D. Daniel	0	2025	ATL	1	0	0		0	0.00	1	0	0	0	1.0	0	0	0	0	1	1	0	4	0	9.00	0.00		0.00	25.0	0.0	0.00	.000	0.00	0	4.08	103	0.00	0
24	Corbin Martin C. Martin	0	2025	BAL	1	0	0		0	0.00	2	0	0	0	1.1	1	0	0	0	0	0	0	5	0	13.50	0.00		0.00	40.0	0.0	0.75	.333	0.00	0	0.08	2	6.75	0.6
25	Freddy Tarnok F. Tarnok	0	2025	MIA	2	1	0	1.000	0	0.00	1	0	0	1	2.0	0	0	0	0	1	1	0	6	0	4.50	0.00		0.00	16.7	0.0	0.00	.000	0.00	0	3.58	89	0.00	0.1